World's Busiest and Largest Harbor: Port of Shanghai

The Port of Shanghai, on the Yangtze River Estuary, is the world's busiest and largest harbor. Since the 1840s, it has grown into a critical global trade hub, handling >43 million TEUs (2021) and >10 million passengers annually. It drives China's economy, employs ~2 million, and continuously expands with automation and AI to enhance capacity and efficiency.